Dualsub - Dual Subtitles for YouTube

Display dual subtitles.

Dualsub - View Dual Subtitles on YouTube

Dualsub - Dual Subtitles for YouTube is a powerful Firefox add-on that enables users to view dual subtitles on YouTube and over 10 other video websites. It supports both desktop and mobile browsers, enhancing accessibility and understanding of video content. Perfect for language learners or anyone wanting to grasp dialogues in two languages simultaneously!

Add-on stats

Manifest V3
Daily users: 5,142
42
Rating: 4.38
(108)
Version: 2.58.3 (Last updated: 2025-03-10)
Version code: 5906960
Creation date: 2018-10-03
Weekly download count: 155
Firefox on Android: Yes
Permissions:
  • storage
Host permissions:
  • https://api.dualsub.xyz/*
Size: 34.78K
URLs: Website
Full description: See detailed description

Other platforms

Dualsub - Dual Subtitles for YouTube (v2.58.1)
100,000 3.64 (435)
Not available on Android
Dualsub - Dual Subtitles for YouTube (v2.58.2)
44,425 4.20 (40)

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Works well for translating non-English languages to native languages
  • Automatically adds subtitles to videos easily
  • Useful for learning languages by providing comparisons
  • Remembers language settings after updates (as noted positively in the latest update)
  • Compatible with mobile YouTube and other video sites
Cons
  • Latest update has removed ability to switch subtitle styles and toggle visibility, making it less user-friendly
  • Native subtitle functionality is broken or unreliable for some users
  • Requires manual language setting for every video change, which is inconvenient
  • Temporary issues with translation services, affecting functionality regularly
  • Duplicated subtitles when using Simple and Standard modes together
  • No support for some sites like ok.ru
Most mentioned
  • Functionality broken in the latest update
  • Issues with language selection not being persistent across videos
  • Problems with native subtitle functionality
  • Dependency on translation service which can lead to errors or downtime
  • User-friendly features that aid in language learning, despite some limitations
User reviews

Giving 4 star's it's working with youtube. Please add support for ok.ru..
by translate, 2025-02-11

View all user reviews

Add-on safety

Risk impact

Dualsub - Dual Subtitles for YouTube requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Request access to the following domains: youtube.com, ardmediathek.de, bilibili.com, coursera.org, iflix.com, iq.com, udemy.com, viki.com, youku.tv, zdf.de, wetv.vip, dualsub.xyz
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of Dualsub - Dual Subtitles for YouTube. Use it at your own risk.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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